Games like Ionball 2: Ionstorm
Games like Ionball 2: Ionstorm include Timberman, Vampire Survivors, A Dance of Fire and Ice, Zuma's Revenge!, and Superflight. We matched them by the tags players give Ionball 2: Ionstorm on Steam (Casual, Action, Arcade, Singleplayer, and Indie): closest matches first, and among equally close ones the better-known games.

Timberman
Shared: Casual · Action · Indie

Vampire Survivors
Shared: Indie · Singleplayer · Casual

A Dance of Fire and Ice
Shared: Singleplayer · Indie · Arcade

Zuma's Revenge!
Shared: Casual · Action · Singleplayer

Superflight
Shared: Casual · Indie · Action

Snakeybus
Shared: Casual · Action · Indie

One Finger Death Punch
Shared: Action · Indie · Singleplayer

Cyberhunt
Shared: Action · Casual · Indie

Megabonk
Shared: Indie · Action · Singleplayer

One Finger Death Punch 2
Shared: Action · Casual · Indie

Project Wingman
Shared: Action · Indie · Singleplayer

DJMAX RESPECT V
Shared: Casual · Action · Singleplayer

Super Hexagon
Shared: Arcade · Indie · Singleplayer

Planes, Bullets and Vodka
Shared: Casual · Action · Arcade

Retrowave
Shared: Casual · Indie · Action

Rogue Legacy 2
Shared: Arcade · Action · Indie

Drift86
Shared: Casual · Arcade · Indie

Gang Beasts
Shared: Action · Casual · Singleplayer

Spin Rhythm XD
Shared: Casual · Indie · Action

Timberman VS
Shared: Casual · Action · Arcade

Waveform
Shared: Casual · Indie · Singleplayer

Music Racer
Shared: Action · Indie · Casual

Sixtar Gate: STARTRAIL
Shared: Casual · Action · Arcade

Trip to Vinelands
Shared: Action · Arcade · Indie